[Intel-gfx] [PATCH] drm/i915/pmu: Aggregate all RC6 states into one counter

[Chris Wilson]

Quoting Tvrtko Ursulin (2017-11-24 17:13:31)
> From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> 
> Chris has discovered that RC6, RC6p and RC6pp counters are mutually
> exclusive, and even that on some SNB SKUs you get RC6p increasing, and on
> the others RC6.
> 
> Furthermore RC6p and RC6pp were only present starting from GEN6 until,
> GEN7, not including Haswell.
> 
> All this combined makes it questionable whether we need to reserve new ABI
> for these counters. One idea was to just combine them all under the RC6
> counter to simplify things for userspace. So that is what this patch does.
> 
> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> Suggested-by: Chris Wilson <chris at chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
-Chris